Maniphest T83207

Inconsistent Bevel Thickness when switching Between Vector and Free Curve Handle Types
Closed, Duplicate
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Assigned To
None
Authored By
Joe Williamsen (jwilliamsen)
Nov 30 2020, 1:37 AM
Tags
  • BF Blender
  • Modeling
Subscribers
Germano Cavalcante (mano-wii)
Joe Williamsen (jwilliamsen)

Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.30

Blender Version
Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: rB0f45cab862b8
Worked: (newest version of Blender that worked as expected)

Short description of error
When using the curve geometry options to make "walls" from curves (Extrusion + Bevel settings), switching from a "vector" handle to a "free" handle causes the wall thickness to increase - which is not expected.

Exact steps for others to reproduce the error

Open the attached file

(you should already be in Top view, Edit Mode for Curve 3, and the control point on the far right selected)

Pick Curve 3 if it's not already picked

Go to Edit mode (should already be in Edit mode)

Grab any of the (straight) Vector handles and move them. Notice that the wall on that side of the handle immediately becomes significantly thicker. It would be ideal if the thickness remained even.

Curve Geometry Bug.blend883 KBDownload

Related Objects

Event Timeline

Joe Williamsen (jwilliamsen) created this task.Nov 30 2020, 1:37 AM
Germano Cavalcante (mano-wii) added a project: Modeling.Dec 2 2020, 8:21 PM
Germano Cavalcante (mano-wii) updated the task description.
Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).Dec 2 2020, 8:35 PM

This appears to be a limitation for 3D curves.


There must be some geometric limitations that make it impossible to achieve uniform thickness for all 3D curve shapes.
But you can work around the problem with 2D curve.
So I don't think this is a bug, but a technical limitation.

Germano Cavalcante (mano-wii) closed this task as a duplicate of T80979: Account for curvature in curve to mesh node.Dec 2 2020, 11:36 PM
Janusch Patas (patjan) mentioned this in T80979: Account for curvature in curve to mesh node.Dec 22 2020, 5:35 PM